CHECK LIST OF THE FOREST TREES OF THE UNITED STATES, THEIR 



NAMES AND RANGES 



By George B. Sud worth, Dendrologist, Forest Service 



CONTENTS 



Introduction 



Important forest trees 



Common names of trees 



Group common names of trees 



Misapplied common names 



Common names of trees and trade 



names of their woods 



Synonymous common names 



Changes in technical names of trees 



Technical names of hybrid trees 



Capitalization of specific and varietal 



names 



Naturalized trees 



Fagc 

 1 

 2 

 3 

 4 

 5 



Page 



Introduction— C ontinued 



Definition of a tree .:. 



Range of newly described and little- 

 known trees... 



Nature of this work 



Acknowledgments. 



Check list of forest trees of the United 



States 



Standard names of lumber and of the corre- 

 sponding trees recommended by the For 



est Service 



Index 241 



237 



INTRODUCTION 



This bulletin is a revision of the Check List of the Forest Trees 

 of the United States published in 1898. The usefulness of the 

 first edition appears to have been established not only among foresters, 

 woodsmen, and wood users, but also in forest schools and other 

 educational institutions. After a lapse of 27 years the necessity 

 of issuing a revised edition has become urgent, particularly because 

 of the enormous increase in our knowledge of North American 

 forest trees and their distribution. Advances have been made in 

 the standardizing of common names of trees; changes have taken 

 place in technical names ; new information regarding the geographical 

 distribution or range of different trees has accumulated; new ar- 

 borescent species have been established. The number of different 

 sorts of trees known has increased to 862 species, 228 varieties, and 

 87 hybrids, a total of 1,177 different forms of trees, compared with 

 504 species, 80 varieties, and 20 hybrids, a total of 604 trees, 

 enumerated in 1898. The large number of trees now known is due 

 in part to the addition of newly discovered native and naturalized 

 species, and in part to the segregation and naming of species and 

 varieties previously confused. 



Greater public interest in our forest resources, with a consequently 

 greater desire to know trees, is being exhibited now than over before. 

 The need of helpful literature on North American trees has been 



